Question

On finding a perimeter and area and there is a decimal for the shape but the 2 other numbers on the shape don't. Do I multiply/add with the decimal on all numbers or only on that 1 number?
EXAMPLE
There is a triangle
one side is 1.5
the base is 2
and the other side is 3

What do I do?

Is the answer for area 9.000?
If that is the right answer please let me know cause my teacher says to divide the number with 2 once you get the answer

Answer 1

As I told you before, you need to know the height of the triangle to find its area.

http://www.mathsisfun.com/area.html

Answer 2

On the paper it says height= 1 b

Answer 3

1 b? What does the b mean?